to native endianness. We must also pay attention to unaligned accesses.
Copy the interesting parameters to a new struct so the rest of the code can
forget about these problems.
Submitted by: Kristof Provost <kristof@sigsegv.be> (cleanup) and me (orig).
The ONFI spec states that at least two bytes of the signature ("ONFI")
must be present, and the CRC must be correct to have a valid parameter
page. If the page is not valid there are at least two backup pages where
the data can also be found.
Submitted by: Kristof Provost <kristof@sigsegv.be> (cleanup) and me (orig).
d_getattr(). Since these drivers use disk(9) KPI and not directly GEOM, use
of that function means KPI layering violation, causing extra g_io_deliver()
call for the request.
In particular, do not lock Giant conditionally when calling into the
filesystem module, remove the VFS_LOCK_GIANT() and related
macros. Stop handling buffers belonging to non-mpsafe filesystems.
The VFS_VERSION is bumped to indicate the interface change which does
not result in the interface signatures changes.
Conducted and reviewed by: attilio
Tested by: pho
This driver does not yet handle multiple chip selects properly.
Note that the NAND infrastructure does not perform full page
reads or writes, which means that this driver cannot make use
of the hardware ECC that is otherwise present.
The NAND Flash environment consists of several distinct components:
- NAND framework (drivers harness for NAND controllers and NAND chips)
- NAND simulator (NANDsim)
- NAND file system (NAND FS)
- Companion tools and utilities
- Documentation (manual pages)
This work is still experimental. Please use with caution.
Obtained from: Semihalf
Supported by: FreeBSD Foundation, Juniper Networks
